When is my puppy ready to roam the house under my supervision?

You can do this any time. Leave the crate open in the room, where he is to spend his time, so he can go into it at any time and feel safe. Realize that your puppy still cannot hold its urine for a very long time yet, so I would not leave him alone for more than 4 hours.

Soil and feces can carry viruses for a long period of time, so trying to find an area Blakely can go where other dogs don't frequent is best until he has had at least 2-3 sets of shots (or the OK from your vet). If you don't have a spot like that, but have a patio area, you could try making your own "potty" area with a piece of sod or a litter box filled with dirt to get him used to going outside and on that substrate without as much confusion when you do transition to outside. Making sure you're taking him out often enough (every 1-2 hours for a 2 month old puppy, or after waking, eating, drinking, or playing) can also help reduce accidents since his bladder can't hold it very long at this point.

You can get started right away! Consistency is the key to house training, so be sure to take Emmitt outside often - after eating, napping, playing, or at least every 2-3 hours. Reward appropriate potty behavior with praise and a small treat. If you catch him in the act of eliminating in the house, say "no" and take him straight outside. If you find an accident around the house, there is no need to scold or punish him. The main concern at this point is that Emmitt is not fully vaccinated against some highly contagious viruses, such as parvovirus. Until he has received his full distemper/parvovirus vaccine series, keep him away from other dogs. This includes areas where other dogs may have previously eliminated, such as parks or around your neighborhood. Keep Emmitt confined to your backyard until his vaccine series is complete.

It's very normal for a 16 week old puppy to still be having accidents in the house - most puppies are not reliably housetrained until 8-10 months of age, or older. It sounds like you're on the right track by taking your puppy out frequently, and praising and rewarding him when he goes - but if he's still having accidents in between potty breaks, I would recommend taking him even more often. I take my puppies out every 20-30 minutes while they are being housetrained, unless they are sleeping. There is no need to cage him after he has an accident, or use any other type of punishment, as this won't help - focus on getting him out more often to prevent accidents in the future, if this is happening. Don't wait for some type of signal that he needs to go - just take him every 20-30 minutes. Once he's gone a full 14 days with no accidents at all, you can start to give him a bit more freedom and space out his potty breaks a bit more. Just be patient and consistent, and give it time - he's still just a baby. He will get the hang of things as he gets older :)

I would recommend going back to the crate and then allowing her around the house, in a leash and only under direct supervision after she comes back in from going toilet and try to slowly extend her range, one room at a time for 30-60mins until she has no more accidents and looks to go out. Do not allow free run of the entire house as she will take time to learn her boundaries

Once he makes the connection that urinating and defecation ALWAYS happens outside, he'll be fine in the rest of the house. It's not so much that he's on the leash inside, it's that you're watching him continuously for signs he needs to go out so that you never let him have an accident inside - the leash keeps him close, but doesn't do the monitoring. If you can't focus 100% of your attention on him, he goes in the crate. If he never has a chance to go inside, and is rewarded for going outside (and as he gets older and can "hold it" for longer) he'll make the connection.

50 days old is still extremely young and Hachiko probably isn't old enough to hold his potty very long yet. He will likely need to go out at least every 1-2 hours, and about 10-15 minutes after eating, drinking, playing, and waking up. You can use this to your advantage to start taking him outside to go potty before he has an accident so he learns to go outside. If you want him to go in a certain area, then use these times to take him to that spot so he learns to go there. Here are a few additional articles about potty training that may be useful to you as well! https://www.petcoach.co/article/top-5-tips-to-potty-train-your-dog-young-and-old/ https://www.petcoach.co/article/5-common-housetraining-mistakes/ https://www.petcoach.co/article/how-to-housetrain-your-dog-or-puppy-using-a-potty-cue/ https://www.petcoach.co/article/housetraining-tips-and-tricks/