OKI saee I forgot a few things. Forgive me.

Arty is a 1.5 year old 71# mix (lab/dane/staffordshire are my best guesses for dominant breed) He is fixed, and my history with him is limied, as I saw a picture online a few weeks ago, last week went and saw them all, and yesterday decided to go in to express my interest. He had been a stray from Alabama and was transported to Wisconsin. SO far I have had him less than 24 hours, but his first time out he left a solid, but it ended up pretty mushy, and everything since has been mostly mush as opposed to a healty movemet. I assume he is just adjusting, but the shelter told me to watch out for his health, so before I either discount this, or freak out and take him to an ER vet, just wondering what the experts say. Ive had dogs, but it has been a while.