These questions are of experimental interest, with several groups possessing the technology to study them using ultra-cold gases [@mukund; @chapman; @sengstock].

In the context of cold gases, spin waves were first discussed by Bashkin [@bashkin], and independently by Lhuillier and Laloë [@laloe]. The key finding was that spin exchange collisions can give rise to weakly damped spin waves even in a non-degenerate gas. Ultra cold gases have provided an exciting setting for observing these spin phenomena. In particular, experiments on pseudo spin-$\frac{1}{2}$ Bose and Fermi systems by the JILA [@cornell] and Duke [@du] groups have observed coherent collective oscillations in an otherwise classical gas.

One expects the physics of a spin-$1$ gas to be far richer than a pseudo-spin-$\frac{1}{2}$ system. This is amply demonstrated by experiments on condensed spin-$1$ gases [@mukund2; @sengstock2; @chapman3; @chapman4]. One of the most dramatic observations was that of a dynamical instability in Bose condensed $^{87}$Rb, studied by Sadler *et al.* [@sadler]. Beginning with a gas pumped into the $m_{F} = 0$ state, they observed the spontaneous formation of transverse ferromagnetic domains. Will a similar instability be observed in the normal state? We find that there is an exponentially growing mode in the unmagnetized gas, even 