<p><span>Thermoresponsive hydrogels exhibit reversible deswelling at the volume phase transition (VPT), associated to a minimum of the Poisson's ratio <span>ν</span>. Recent numerical investigations uncovered the occurrence of a hyper-auxetic transition (HAT) (<span>ν</span> = −1) for low-crosslinked hydrogels at low temperature, accompanied by a critical-like behavior. Here, we perform extensive numerical simulations to unveil the relation between these two transitions. We find that the HAT occurs at different temperatures <span>T</span> up to a maximum value of the crosslinker concentration <span>c</span>, thus being clearly distinct from the VPT, taking place at fixed <span>T</span> for all values of <span>c</span>. Our results provide novel fundamental insights on the interplay between network collapse and mechanical properties of these fascinating materials.</span></p>