Trigger had had around 5 months of freedom before finding himself enclosed - he was born in the January and the fence was completed in October
he spent a week thoroughly exploring it, trying unsuccessfully to climb the wire (and having to be disentangled numerous times) and looking for escape holes - then accepted his lot apparently quite happily - though I had been shutting him in from dusk to dawn so being able to go outside during the night was probably a big consolation
thereafter he has escaped a couple of times, when I have not shut the gate properly, and cried piteously for an hour after being recaptured - but that was it - Tiffany has never got out and has never shown the slightest interest in doing so
Tosker in a way is the best judge of the impact my enclosure has on them, as he can climb out, and does so a couple of times a day, but is back within 15 minutes maximum, despite being surrounded by fields and farms - it seems home is best
as Tinky has been used to free roaming I think it might be better for him, psychologically, if you curtailed his freedom a bit now if you are going to enclose the garden, so that having complete freedom to come and go afterwards will make up for having less space to do it in