Chuckit! Bucket with 8 Ultra Balls

We've been buying these balls for 7 years now, they used to last a long time and were great for the teeth, but with the last order, strangely enough, they started splitting at the seam really quickly. It seems like the composition has changed? We're going to order them again now, we're curious to see how they'll be.

They tear really quickly at the seams, which I find a real shame... already worn out quite a few because my Pip won’t accept any other ball... I’m at their mercy haha