Never seen a Bulldog loader, before
How about a picture,
had a Ford 730 model on my 3000 and it was great, If the Bulldog works near as well as the Ford unit, You should be in great shape.
The only weak area on my Ford with the 730 was the front axle.
Pushed to hard over rough ground at max load can over stress them if not paying attention. Have heard some people source an industrial front assembly and that takes care of the weak link.
Congrats on owning a 3600 with FEL , great sized, capable tractor and having a FEL only broadens the versatility.
ps. did move round bales with my Ford, but when we switched to Large square bales, I had to use the Rhino with a Koyker FEL
I could get the bales off the ground with my 3000 but not do any stacking.
To be fair the Ford was handicapped by using an add on round pallet fork to lift bales- so the weight was completely centered in front of the bucket.
Had it been modified for some sort of quick attach forks ( bucket removed) I believe it would have lifted the square bales at least as well as the Other tractors loader.