Naw not really a good thing. All squash is 'safe' but starchy and should only be small small amounts-pumpkin is probably the only squash I would feed and at that-I would feed the plain canned kind. Sweet potato in particular is very starchy and not good to feed.
Now for yourself if your wondering what to do with them, you can certainly freeze them so you can use them all. There are tons of great recipes-Sweet potato fries are easy to make and I made a really neat desert with them this weekend (It was thanksgiving here this past weekend)-I blended cooked sweet potato with a little flour and milk plus an egg and brown sugar (Not exact amounts at all so perfect for me to bake) Then topped them with a mix of: Butter, flour, brown sugar, cinnamon and pecans. I just eyeballed the amounts and it was a big hit
Easy as pie (Easier than pie!)