Basildon, chicken, if skinless, doesn't add much in the way of calories, same with the hot dog, but the tripe, sausage and cheese would be fatty - so perhaps keep them for high grade rewards and stick to the lower cal stuff for kongs.
Don't know about the food you have Fitz on, but ours is worked out on predicted adult weight, rather than current puppy weight and if you are worried you could take off a small percentage of kibble allowance to allow for the treats and kongs.
Pip is the same with kongs now, he's gone from being unable to get past the top segment to being able to demolish them ridiculously fast. I have to go to the Harvest Festival at the school on Friday morning, because ds2's class is doing a play. So yesterday for, afternoon school run, I stuffed loads of kongs and busy buddies etc to see how long they lasted.
He had 2 small puppy kongs stuffed with chicken and Fish4Dogs salmon mousse, 1 medium puppy kong with chicken, salmon mousse and kibble and one medium adult kong with the same filling, plus a kong dental bar smeared in mousse and a medium puppy busy buddy. That lot lasted him from 3.05 to 3.53 then he started to whinge at me. I checked and he hadn't reached the ends of the kongs, so showed them to him and put them back in his bed - it then took him 10 more minutes to empty the lot. 
So, I am going to be out for an hour and a half-ish on Friday and he's most likely going to yell the place down for the last half hour. 
The problem is, my neighbours - who are lovely - but are both retired, stay up really late and lie in bed late in the mornings.
Fridays are my biggest worry as well, because it was a Friday morning, shortly after Oldgirl died, that they stuck an angry note on my front door telling me that Lurcherboy was 'howling ... again!'. We had no idea he was doing it before then and seeing the note really upset me, as I was already raw from the loss of my girl. I was very angry and upset that they stuck such an angry/rude note on the door without bothering to speak to us first, as how on earth could we know he was howling when we weren't there, unless they told us?
I made myself ill worrying about it, stressed constantly and hardly left the house for weeks. Spent hours stuffing kongs and treat balls and walking him 3-4 hours a day to try and wear him out so he'd be quiet during the 3 school runs a day I had to do last year, plus doing an intensive Separation Anxiety programme with him.
It was ok in the end though. Eventually I managed to catch and speak to them and they were actually very nice about it. Probably because we took immediate action, so he wasn't bothering them anymore. They hadn't realised we'd lost Oldgirl, were fine once they knew we were working on it and said not to worry as it was so rare they heard him and if he was left it was never for longer than an hour-ish, but I'm so stressed worrying about Pip disturbing them now that we have Lurcherboy sorted - I don't what them to think we're taking the proverbial 'P'.
I did tell them we would be getting a pup and that it had been recommended by several Lurcher experts and a couple of behaviourists, as Lurcherboy actually suffers from Isolation Distress, not Separation Anxiety - which means he isn't over-attached to us, he just get's stressed when he's totally alone - as he's always been with other dogs from birth - so getting another dog was most likely going to be the best solution. Even so, we waited until Lurcherboy was able to be left for an hour and a half without howling before we got another dog.
The thing is, we didn't bank on getting such a noisy monkey as Pip! 
The irony is, that when we go out at the moment, Pip is in his crate in the living room and Lurcherboy is still in the kitchen on his own!
Neighbours have brought their caravan home this week though, so fingers crossed they may be going away and we'll be able to get Pip settled in the kitchen with Lurcherboy without upsetting them.