Don’t know about you, but getting soaked while at an agility trial or out at some function or other isn’t my idea of a whole lot of fun so….
Here are some suggestions from agility folk…I haven’t tried them. I just do the simple dollar store plastic garbage bag with a good hat…works for me… and then I stay out of the rain as much as possible. Plus…unless it’s a cold rain…a wee bit of water isn’t gonna kill a person. 
- cabela’s among the many things they do in primarily hunting/fishing tcthey also do rain gear
- frogg togg’s. Some like their stuff, others don’t.
- marmot precip rain gear
one happy customer says:
I got the Marmot precip raingear from cleanrun and so far I am VERY happy with it. It helped me get through quite a serious torrential storm that lasted a week, and just amazing how much more comfortable than any other raingear I’ve ever had. My daughter opted for a marmot made of gortex ……, and she seems happy with her stuff too. I really like all the Marmot stuff we have. The raingear I do NOT recommend is anything is anything with a DWR coating that washes off, because we have had just terrible luck with those, in spite of following all the recommended care.
One time we did agility in the snow and rain and consequently mud, not soo fun! But Mum was prepared and warm.
Good stores!
Woofs, Johann