15 yr old female cat. great personality.. Has stage 2 kidney disease a yr ago. Per doc im giving her a weekly injection 50 ml liquid base of neck. worked well for awhile and kept her at # 2. last several times very fearful and fighting. May have to put her down(prefer not) if I cant find another way to give those injections. Any safe home remedy that would relax her to do the job. Any help would be appreciated