I adopted Zannie 9 yrs ago then 5 years ago rescued 2 kittens from dangerous situations Buddy has asthma and Kallie is overweight 2 months ago rescued 2 more kittens at a very busy convenient store parking lot. One, “Baby” is blind “Sissy” is his sister my issue is the other cats have adapted pretty well to kittens but Zannie has not but Baby does she sense he is blind? Any suggestions? Many Thanks!