Hi Doc, My Mom Is Already Bedriddent Due To Vascular

hi doc, my mom is already bedriddent due to vascular dementia, s
we are feeding her through ngt, and her milk is ensure gold, suddenly her diaper has this crawling red ants ,, what is the reason behind? the last time this happen, we went to the doctor and had a sugar check , but its normal, what could be the reason behind? thank you so much