TJ – is “SD” Science Diet? Just want to clarify.
As crazy4cats said make sure to check with your vet to see if there are any parasites that are causing the problem first.
Personally, I think that it could have to do with the level of protein and fat in the Merrick GF especially if you are transitioning from Science Diet. The protein and fat amounts are dramatically different. Also, dogs have individual needs, so what may be good for one dog may not be good for another. Science Diet averages around 25% protein and Merrick GF has almost 43% (dry matter) protein with a few exceptions that go as slow as 33.7%. But either way Merrick is a much richer food than Science Diet that their system is not used to.
If the pumpkin is not helping than I suggest you try a moderate protein food between 32% to 35%. Such as Fromm Four Star Grain Free, ACANA Regionalās, Annamaet GF or Born Free. Merrick does have a Lamb & Sweet Potato GF formula that has a moderate protein amount but the other GF’s just go up from there. After feeding the moderate protein food for a while, try again switching to the higher protein levels.
