For now, i would not take either dog to a park which contains other dogs or ppl, not just yet. I wouldn't, as every minute they spend re-establishing their habitual reactions to either other dogs, or ppl, is one more strengthening of their current attitude. I would not do this at this time. Especially since it is unfenced (?) and your dog got hit by car by that park.(if i read your post correctly) We take them to a few different parks. They tend to be fine if the owners or dogs keep a distance. They tend to stay away from any roads (one we take them too is road access to a golf course) another one we take them to though not s often is a small park down the road that has two enclosed tennis courts. We don't go there as often as the dogs pws tend to get sw or cut from the rough ground of the tennis courts. The park where Zara got hit by the car is big and not directly near a road the dog chsed her ll the way out the park and into a panic so she just kept running. Was so angry at the owner, didn't even stop to help mum look for her. Luckily she only hd raw pds and a sore leg no serious injuries but she reacts worse to german shepherds now. This park is usually a good one to take them too as if you time it right its not always busy. Near us alot of the parks i know of are used alot by people and dog owners (loads of dog owner around here) and I dont know of any that have a fence around. Do you think if i took just Bella and Jenny (the older better behaved one that loves other dogs) that would help or just Bella on her own. I tihnk Bella and Zara do feed each others nervousness when they are out together. Another problem I have with Bella is she barks all the time in the car even if her view is blocked. She can't be destracted.