I tried using oil red O and Sudan black B but I didn't get good results. I used cryostat sections and fixed the tissue into formaldehyde and then sucrose in advance but the tissue field is always ruptured.
I have never worked with animal tissue. Positive results have been obtained with plant tissues using Sudan III and Sudan IV. I have stained both live tissue, sectioned with a vibratome and fixed in agarose, and tissue sections fixed in epoxy resin.