My dog is aggressive towards my other dog over toys. Help!

If they are not spayed then you should start with that. Hormones can certainly cause aggression. After the surgery it takes about 30 days for the hormone levels to decrease to a level that may change aggressive behavior. If that does not help then you should consult with a professional in-home dog trainer to help you sort out the root of the problem. I see you are in Puerto Rico. There is a HUGE free spay/neuter campaign coming there in November. I suggest you check it out if you want to get your dogs spayed. Search "Spayathon for Puerto Rico" on Facebook to find their page. Hope this helps. Best wishes.

This is not unusual behavior as they are trying to work things out. I recommend to always supervise them together until you know there is not chance of a fight. Some dogs are more possessive of toys or food or their person and thats just how they are. Certainly not leaving toys down and only giving them toys when you are home to supervise will help. Do not allow them to steal each other's toys. Also, both dogs will likely think ALL the toys belong to themselves and not the other dog. If you cannot supervise then, you may separate them during chew times with their toys. Heavy daily exercise will help to get some of the energy out and this can help to decrease aggression. I also recommend to pick up some books about dog behavior so that you can recognize what the dogs are saying to each other. Lastly, there are several different training methods out there. You may opt to find a trainer who can come to your house and show you how to modify the dogs' behavior. Find a trainer who's style works with yours. This will take some time to condition the dogs and yourself. I hope this at least points you in the right direction. Please post again with any further questions.

Resource guarding over toys or other items is very common in groups of dogs, and is even considered to be fairly normal behavior by many trainers. Most dogs don't like to share valued possessions with other dogs! This is a very difficult thing to address successfully through training, so in most cases the simplest option is to simply keep toys, sticks, etc. picked up and put away when groups of dogs are playing to avoid any issues :)

From this little bit of information it's really difficult to know why the dogs are continuously fighting. Aggression between dogs can be due to fighting over resources such as food toys or attention, can be territorial or sometimes even affected by hormones. Spaying and neutering and helps in many situations if they are not already fixed. Here are some websites with behavior articles that may help. http://www.veterinarypartner.com/Content.plx?P=SRC&S=1&SourceID=47 https://drsophiayin.com/. Good luck

I hate to hear this is happening. Unfortunately, it's impossible to know how best to advise you without being able to read the body language of the dogs. It's possible this is occurring because they are maturing. Both dogs also need to be spayed/neutered because this can help to decrease aggression. Intact dogs are much more likely to fight and have problems. Canine aggression is a complex behavior as it can stem from dominance, possessiveness, fear, anxiety, resource guarding or a combination. Most people are not familiar with reading canine body language and training. Because of this, I recommend to work with a professional trainer. Researching on your own will also be helpful. Familiarizing yourself with canine body language and dog training can help you to recognize what your pet is trying to say. You can find many books written on the topic and there is a trainer named Victoria Stilwell who I think is particularly helpful. Best of luck.

I'm sorry that you're having this problem! Aggression between dogs in the same household is a complex behavior issue that is a bit beyond the scope of what we can effectively help with in this format. Treatment for this problem involves identifying what triggers the aggression (which often takes a bit of detective work, and observation by an expert) and then finding ways to avoid these triggers, or working with the dogs over time to teach them to respond differently when these situations occur. It's not a simple process, unfortunately, so there's really no quick and easy answer to give. Your best option would be to make an appointment with a veterinary behaviorist who can evaluate the dogs in person and give you some hands-on guidance in dealing with this problem. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org

It's normal for dogs to be somewhat possessive over food and toys with other dogs, so without more information it's hard to say whether this is an issue or not. In many cases, it's easier to simply manage this issue by feeding the dogs separately and not giving high-value chew toys or other items that are likely to cause fights when the dogs are together. If you feel that the aggression is excessive (i.e., there have been injuries to the dogs, or he behaves this way over everything, rather than just food and high-value items), it is possible to work on the problem but this takes a lot of time and effort. The basic approach involves teaching him that having another dog nearby when he is eating means good things for him - often this is done by walking another dog nearby, feeding a treat, and moving the other dog away. It usually takes hands-on guidance from a professional to do this correctly, so if this is something you want to work on, I would strongly recommend getting in touch with a good reward-based trainer in your area.