Im with you Howler... A face full of buchshot usually puts some fur on the tail gate... I like 4buck myself.. but if you really want to get by cheap... Use some 00buck, they are big, but if you hit it, that coyote wont get to far...
Good luck and congrats on the baby... Aint nothing like a child to make a life complete...
Mike
Pure Predator Custom Calls
www.purepredator.com