Hello. Looking for some advice. My male puppy is 41/2 months old. We got him at two months old. He initially had Giardia which was treated and resolved. We are still working on potty training. He has frequent accidents which the vet said is normal for this age. He is crate trained and spends a fair amount of time in the crate mostly due to house training issues. We keep increasing his time out of the crate and spend a fair amount of time outside when the weather is good. Lately, he has been biting a lot and growling at the kids. He chews anything he can find. I thought at first he was just teething and that this is normal puppy behavior but now I feel it may be aggression. He growled at my 10 year son tonight and bit him when he tried to put him in his crate. He did not break the skin thank goodness. He constantly nips at my 4 year olds fingers and toes and bit him as well yesterday. He also nips at me and my husband. I don't allow my four year old to be alone with him and remove him when he bites. I also have a squirt bottle with water that I use when he becomes aggressive. He stops when he sees the bottle but his biting is pretty constant. He is very playful and likes when the kids chase him and play fetch. He has made some progress with commands. He comes when he is called, pees on command, and sits when given the command. He can be very sweet and loves when my 10 year old rubs his belly. We are home most of the time, as I am home with the kids remote learning. I am admittedly a novice. Any advice would be greatly appreciated. Thought about taking him for training. However, it's a little difficult with Covid restrictions and no one to watch the kids. Thanks in advance for any advice.