From Hills to Pro Plan, having issues

Anyone else have issues when switching from science diet to Pro Plan?

Pup has been on it for about a week now (mixing new with old) and has the Shits bad. I understand digestive issues etc, especially when switching to a new food, but he hasn’t had a solid poo in awhile and is going alot more frequently (2-3 times after bedtime alone).

Just wondering if I should just eat the money and switch him back to science diet or wait it out.

Switched purely because I get more food for the same price.

Didn’t have this issue when switching him from Blue Buffalo to Hills

submitted by /u/Complete-Effect7756
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