Amanda Walsh, a wildlife rehabilitator at the Northwoods Animal Rehabilitation Center, knows what fall weather can do to food the animals she works with often eat.
"When the frost hits, the freeze and thaw kind of ferments the fruit inside the berries," Walsh said.
The problem comes when birds eat that fruit.
"They tend to act almost drunk, disorientated, flying in circles, running into windows repetitively, things like that," Amanda Schirmer, a wildlife rehabilitator the Animal Rehabilitation Center, said.
The wildlife rehab center in Minocqua has had animals brought to them drunk.
"In the time that I have been a rehabber here, we have seen it in a couple of Northern Cardinals," Walsh said.
Rehabbers diagnose the animals by feeling their joints to see if anything is wrong and checking if they are bleeding. Birds can recover from being drunk just like humans.