Quote Originally Posted by Karen View Post
Some dogs - especially larger ones, can be fine with grapes in limited quantities - my Great Uncle Mac's Border Collie, Molly, would leap to catch one 6 feet into the air. But raisins are, of course concentrated, and Wolfy, for all his fluff, has so little mass to him that it is scary!
From what I've read up on this, a dogs size is not the issue. They say it can affect one dog and not another.

Say Layla (75#)might eat one grape and become very sick and Jake (40#) could eat ten and have no problem at all.