Nanna is alittle over 3 months old. She seems to have an upset tummy alot. She has been the the er vet because of it and we weren't sure what was wrong. Is this normal as a puppy. Will she out grow it? She drools, want to be in her crate and walks around like she is blind when she is not feeling well. I have had 3 different vets look at her and they all said she is very healthy. I have her on Nutra puppy mixed with purina puppy chow. I was going to switch her off puppy in about a month or so unless I run out first. I hate crating her but when we are gone during the day I feel it is the safest for her until she is older. What do you think?