Thanks all! Yeah so far each style I've tried (except the spreader bars) has its virtues.
I will check out Jack's and "Mr. Hammock" and have been reading through the bridge posts. I am going to drag out an old sewing machine and take it in for a tune-up. Have already bought a piece of "upholstery" fabric and smaller section of canvas to use to reinforce the ends, grommets and am braiding thin cotton string to use at the ends - will see how this works.
I have a (2 months short now) 16 year old Golden - he had a stroke last year and we are now approaching the end of time for him with renal failure and some cardiac - he can no longer get up or stand and I pick him up and carry him out every couple of hours when I'm home. I moved into the living room so I didn't have to carry him so far (and my back gave out). The cats are upset over the loss of sleeping with me and haven't adjusted to the hammocks yet (all have their claws - strickly indoors).
I currently have the dog on 3 inches of eggcrate covered with blankets right next to me in the hammock. My son suggested building him a hammock because his boney hips are in danger of pressure sores when I am gone to work for 12-13 hour days and he can't turn (and is incontinent). My concern is his flipping (he flopps around like a fish) out of the hammock and getting into a predicament while I am gone. Still looking for ideas on this too.
Thanks for the welcome and suggestions!