Silent Tide War Hounder Question

[Trueshots]

Ok, the War Hounder's are CR 1/2 and it says for subtier 4-5 they need to be CR1. There is no conversion or addition stat block provided. All it says if give the (x) amount more hit points. Anyone know what the stats are suppose to be or how I do the conversion math to increase the CR rating? Thanks

[Pirate Rob]

Look at the first encounter, it has stats for both sets of War Hounders.

[Doug Miles]

Look at Act One on page 5. The stats for the CR 1 War Hounders are there.