Hi,
It is not advisable to wrap anything around the abdomen or tummy that might tighten or move - these horse bandages can become tighter once they are in place. Bandages also are very closel applied to the wound and can lead to it becoming damp and itchy, then causing the dog to try to lik and chew.
If you cannot manage the collar, I would recommend dressing her in a tshirt, with her head through the head and froelimbs through the arms - you can cut these if they are too small. Choose a t-shirt that is of a size that it would fit snugly over the chest, not too tight though.
Dog Veterinarian
BVetMed MRCVS since 2004, have a high caseload of canine patients and perform acupuncture.