Hello. We have an almost 6 month old shepherd mix, who for the last week has been having frequent diarrhea in his crate and around the house. He was previously house and crate trained, minus the rare excited pee dribble. At first we thought it was health related. The vet checked him out and he is not dehydrated, does not have worms, parasites or infection. She suggested it might be behavioural. I'm wondering if it could be food related. When we got him from the rescue he was being fed Purina Puppy and Dog Chow mixed with wet food and warm water. We had no choice but to switch right away, and we picked Performatrin Ultra Grain Free Large Breed Puppy. He was on this for a month, hated eating it, did not gain weight and it caused 7-8 loose stools a day, not diarrhea but still really loose. The vet recommended Pro Plan Focus Large Breed Puppy. He loved eating this food, poops were great, but still didn't gain weight. So after a month on this the vet recommended switching again. He has been on Iams Large Breed Puppy for a month now, loves the food, has been gaining weight well and we thought doing well...which is great because really didn't want to switch food again on the poor guy. This past week though he has been having diarrhea frequently. Like, none of his poops are formed or normal, all just liquid. We have always mixed a few tablespoons (usually 3-4) of wet canned food into his kibble, and the brand of wet food has not changed. Its Presidents Choice Extra Meaty. The only thing that changes is the flavour...I'm wondering if wet food could be the cause of his diarrhea this past week???