<human>: My dog is a 7 year old rescue we have had for 3 weeks. He came to us slightly under weight, he was only at the shelter for a month. They had been feeding him science diet. 
When he came to us, I started mixing in some Avoderm canned stew as a topper to one of his meals a day. His poop turned from mushy to solid. I fed him carrots and treats a well.
This week I decided to transition him to AvoDerm dry food, so I've mixed some in with his science diet. Two days ago was when I started mixing the new dry food in. He seemed to love his new food, no issues. Yesterday I gave him a hard boiled egg mixed in with his dry foods and he also managed to get into some left over food I had. The weird part began last night , when we put him to bed we normally give him a dentasix treat, which he eats right up. He didnt touch it, was still on his bed this morning. Today He didnt even finish all his kibble. He's running around like normal. What's up, should I be concerned?

Condense the text into a few key points
<bot>: Been transitioning his food for the past 3 days. Last night he didnt eat his bedtime treat and didnt finish his food today. Still active and running around though.