My BBW's certainly weren't getting up into any trees. I thought they would before I started running them through my orchard, but nope. They do a great job fertilizing though and eating up pests. r2elk might have a point about the manure load. 2 or 3 turkeys in a 10k sqft area for a couple months might not be a problem, but those birds plus 8 ducks might be alot of manure for your trees, just sayin... Burning your grass is one thing, but lemon trees are something to make sure you're getting the most out of.