QUOTE(birdnbloke @ Feb 8 2007, 02:48 PM)

To many people, dogs and cats are like children to them. Why would someone bringing their dog on holiday cause suspicion to an immigration officer? Would someone bringing their children with them on holiday to the US be suspect as well? Of course not! lol
I think some people are grasping at straws here....I can't imagine that AOS interviewers ask anyone, routinely, if they brought their dog with them when they came here, thus proving they had
premeditated intentions of marrying a USC and immigrating to the US..... Just a thought

I am glad you raised the point of children, just like pets having them in your home country tends to show strong evidence of ties to that country and non immigrant intent. Most people could not afford to take 90 days vacation which is the maximum time allowed in the US under the VWP and the children would not have 90 days school vacation time either, so if someone arrived with kids in tow for 90 days that would equally give rise to suspicion as to intent.
Having a return ticket for the maximum time permitted in itself raises red flags. The vast majority of people entering from the UK on VWP do so for a 2 week vacation not for 90 days. ANYTHING out of the ordinary pattern of a vacation visitor raises a red flag.
The OP has that issue to deal with before any others.
I deliberately asked the question about the pet passport because if the dog did not have a chip then it is an automatic 6 months quarantine on return to the UK and the " I could not bear to be parted from my pet for 3 months " argument collapses instantly. Likewise I wanted to know where the return ticket was to. There are a limited number of POE in the UK that you can enter with an animal, so once again the issue could have been raised.
Where people are called for a secondary interview they are subjected to questioning a whole lot more personal than did you bring a pet, so your assertion that an IO would not follow such lines of questioning is incorrect.
Always remember that in a situation where the applicant is AOS from VWP the onus is not on the IO to prove you had immigrant intent but rather on the applicant showing that they did not have such intent. Anything that may give rise to issues over this a potential difficulty. I am not grasping at straws it isn't my application, but to suggest to the OP it is OK to live with the misconception that there is no possibility that the dog could be raised as an issue and everything will be fine is plain bad advice.
Just another thought