There is now such depth in the backline that even cast-iron veteran Craig Clare started off the bench, with the No 10 jumper going to Dane Whale for his 50th first-class game in a memorable occasion for the family, as younger brother Ben made his first-class Whanganui debut.
The elder Whale made it an occasion to remember as he and Horrocks took control of proceedings with some probing kicks catching the Poverty Bay wingers out early, while Whale slotted seven goals from eight attempts before making way for Clare, only to return at halfback for the final minutes when Horrocks retired.
Up front, try-scoring skipper Campbell Hart showed no rust despite only 20 minutes of rugby in nearly two months - making some surging bursts, swamping tackles, and holding ascendancy in the lineout.
Hooker Dylan Gallien was everywhere, while props Viki Tofa and Hadlee Hay-Horton were full of running, particularly in the second half where Whanganui really found a groove putting the ball through the hands.
Hart had to smile that even the veterans like Horrocks and reserve hooker Roman Tutauha were striding out and charging at full clip.
"When the conditions allow, you know? These days, you want to set the exciting players free, and it was good to see everyone running free.
"It was a bit of a frustrating start, we did score early but we were our own worst enemies early on – dropped balls and not looking after the ruck; probably turned over three or four rucks early.
"Definitely need to work on that and put a bit more emphasis on those areas – can't lose the ball and possession like that."
Whanganui's discipline was solid, especially given Poverty Bay prefer a helter-skelter style of play, as the home side had an 11-9 penalty count in their favour, while the visitors finished with 14-men after reserve back Penikolo Latu was sin binned for a high tackle.
"We got lots of goals around penalties, it's a good positive area. Other goals are around defence, good to look at those and see how they're tracking," said Hart.
"Lineout, our job's to set a platform so our exciting backs can go, and I think we did that at times today."
Due to level 2, the teams had to forego the traditional aftermatch function for a junior footy-style sit down on the field, where Hart singled out Whale for special praise.
"You can't ask for a better team man than Dane-o, he does whatever is asked of him, attitude's always positive.
"It's a real mark of a person how you respond to different situations, and Dane-o's always done the best for this jersey."
Thinking about a tight points table where every bonus and a healthy for-against record could prove crucial for staying in the top two, coach Jason Caskey was delighted his squad kept up the intensity right to the 80th minute.
"That's what we kept talking all the way through - even when you start getting away a little bit [on the scoreboard], it's working really hard on our D, because at the end of the year without a semi, it could all come down to that points differential.
"It becomes really vital that we don't concede needless points. Holding these guys to 12 is a good result because they often score 30.
"We were a little bit rusty early but once we got going there was some great skills at times.
"A couple of times we just a little flat and a forward pass here and there, but just through the hands I thought we got a hell of a lot better as we went along.
"We're happy with that, and it's always good to get that first one under the belt and get a bonus point, which is ultimately what we wanted."
Whanganui 65 (Kameli Kuruyabaki 2, Josaia Bogileka, Semi Vodosese, Lindsay Horrocks, Campbell Hart, Viki Tofa, Alekesio Vakarorogo, Peceli Malanicagi tries; Dane Whale 2 pen, 5 con, C Clare 2 con) Poverty Bay 12 (Andrew Tauatevalu, Dan Law tries; Kelvin Smith con). HT: 27-5.
