Horse named Magic boy with asthma. Boy can’t kep up with his older brothers, but parents give him elderly horse named Magic, when time for the horse to die the groom arranges to have the horse disappear, stall door left open, boy is heartbroken but a little older and growing healthier.
This is The Golden Mare by William Corbin, published originally in 1955, it later had a Weekly Reader paperback edition; a Xerox Education edition came out in 1978
“Robin, who has had rheumatic fever, is allowed to ride only the gentle old palomino mare Magic, but Robin sees her as a beautiful devoted friend.”
Thank you so much! I did belong to the weekly reader book club as a child, but I didn’t remember that the book came from there. I’ve wondered about it forever and wanted to re-read this story. Thank you!