Was the reaction last year the same seasonal time as this year? My guy had horrible hives, manic itching three years in a row, in the summer about the same time, never able to isolate it. I concluded it was a seasonal plant or lawn fertilizer, Dr. Young disagreed, LOL, he thought it was ants.
One months difference in time {Later this year} because due to funding I was a month late on her shots. As a matter of fact it is the same number of days after shots the issues started.