Does anyone have a suggestion for a good life jacket for my dog. I have a Boston Terrier that weighs 25 lbs. We have tried both a small and medium jacket from Outward Hound, and neither fits well or keeps his face out of the water. He LOVES getting in the pool, and can swim without one, but just barely, and he tires quickly. I would love to find a jacket that works well enough that he could stay in longer without getting worn out.