I wouldnt. Not only becasue it may cause digestive problems like diarrhea, dehydration, etc. But also becasue theyre terrestrial snakes. Birds may be a tiny part of their wild diet but its not a staple. i dont see it as being a healthy, and cost efficient solution to the issue you have with rodents. If you are worried about cost efficiency, breed your own rats. But that really is only cost effective if you have more than a couple balls. If you only have one it might be cost effective to buy ft in bulk at reptile shows, or from the websites. They keep forever in the freezer and you may only have to buy 1-2x a year if you do it right.