my appy is 27 yo, this exact time last year he started dropping off and had scourers for months, he got an edema under his tummy and a hematoma between his front legs , i had every test done and tried every remedy there is, nothing helped, i just kept pumping the feed into him and he came good on his own. now its back! (like i said, same time as last year) his poo is like a hose squirting water. edema under his tummy, he is lethargic and seems annoyed when i touch his face. could he be grass affected?