One of the family of wild greys who nest in a huge maple in the neighbor's yard, and frequent underneath our bird-feeder, eat the woodpecker suet we hang,, and drink from the water dishes under the tree, can no longer stand without gut-wrenching effort (but he can stand).
This behavior was first seen exactly a week ago, when we saw him (or her) dragging itself in circles. For weeks before this it appeared wobbly, but now suddenly paralyzed. I frantically searched and thought MBD (yes I've read the emerency link), but the local wildlife rescue center said it's 99.99% probability of raccoon roundworm.
After reading several very instructive threads going back a year or more, my questions are these.
1. Is there any reason I shouldn't try to (correctly) dose these wilds with the de-wormer infused peanut-butter in a shell trick described elsewhere on a thread about a wild grey? I understand the need to repeat dosage 10 days later, and the need to deliver one dose to one squirrel, but as long as I go slow and watch who picks up what, could I at least try to de-worm ALL of them, not just the sick one?

2. Is MBD strictly limited to captive pets? Or is it within the realm of reason to imagine that by gorging on suet and the feeder's overspill, a wild squirrel would develop MBD? The local center eliminates MBD from the conversation about variables each of the 3 times I've spoken with them. The products in the suet and seed feeders are not intended for squirrels, but we don't mind indulging ours, and it's all hanging except for groundspill. Since last week I've been adding almonds and walnuts to a dish on the ground. This is to ensure calcium is in their diet.
I assume we've lost at least one squirrel who's too far gone, but we'll continue to feed and water and try to deworm him if possible. We fear a second is showing early signs. The center says areas around food and water dishes aren't likely to be used by raccoons as a toilet. I don't want to remove the water dishes unless someone says otherwise.
What started out as a beautiful Puget Sound summer is becoming a slow-motion nightmare of doom. Thanks in advance for any advice.