Was it you a few months ago, asking about this being poisonous?
Hopefully, the goats only ate a little of the branches, and you spotted them? At this time of year, animals are beginning to get hungry, and anything green looking will be eaten, poison or not.
How long ago was it that they ate the branches? Can take a while for things to take effect (hopefully it won't) but keep a close eye on them. I would expect them to have the runs, but that will get it out of their system They will look very miserable while they have a tummy upset, but water is important. and warm water and bicarb are usually acceptable, as is water sweetened with treacle, or what sugar beet has been soaked in.. I assume they are still eating their hay.....
Fingers crossed they will be ok.