Techniques
Seven deductions, cheapest first. Every Hoot & Fox puzzle can be solved using only these — the app's hints name them so you learn as you play.
1
Pair → bookends
Two alike together decide both neighbours.
2
Gap fill
An alike pair with one cell between fixes the middle.
3
Count exhausted
A line with all its owls placed is all foxes from here.
4
Count pressure
When the remaining owls can’t fit without a crowd.
5
Triple look-ahead
Test a cell; if it forces three in a row, it’s the other animal.
6
Links = and ×
Using the joins to carry a known cell across.
7
Chain reasoning
Both branches of a two-way cell agree somewhere else.