Baby Red Squirrel Lost His Mother

While I was working in my back yard in the wood pile I heard a noise, looked over and this baby red squirrel was watching me from about 2 feet away. I said ’hello’ and he ran right over to me and would not leave me alone. When I set him down and walked away quickly he chased me and ran up my leg. Still trying to figure out what to feed him (her?). I hope he has not imprinted on me. I have another video I took of him chasing me around the back yard and in the house. Food attempts so far: plain water, not