an old cow had a calf 5 to 8 days ago and the calf is real sluggish. I first noticed the right eye shut with drainage... the calf was real weak and barely following up with momma, I watched him in his 4th or 5th day for 30 to 40 minuites a couple times a day and never saw him latch and suck. He keeps looking and trying to suck around momma's front half and then up high on the utter but never saw him latch once. I am wondering if he is getting anything? @ what point do i move to Milk replacer?