  In natural SUSY models higgsinos are always light because \mu^2 cannot be
much larger than M_Z^2, while squarks and gluinos may be very heavy. Unless
gluinos are discovered at LHC13, the commonly assumed unification of gaugino
mass parameters will imply correspondingly heavy winos and binos, resulting in
a higgsino-like LSP and small inter-higgsino mass splittings. The small visible
energy release in higgsino decays makes their pair production difficult to
detect at the LHC. Relaxing gaugino mass universality allows for relatively
light winos and binos without violating LHC gluino mass bounds and without
affecting naturalness. In the case where the bino mass M_1<~ \mu, then one
obtains a mixed bino-higgsino LSP with instead sizable w_1-z_1 and z_2-z_1 mass
gaps. The thermal neutralino abundance can match the measured dark matter
density in contrast to models with a higgsino-like LSP where WIMPs (weakly
interacting massive particles) are underproduced by factors of 10-15. If
instead M_2<~ \mu, then one obtains a mixed wino-higgsino LSP with large
z_2-z_1 but small w_1-z_1 mass gaps with still an under-abundance of
thermally-produced WIMPs. Portions of the light wino parameter space may
already be excluded by the IceCube upper bound on the spin-dependent
neutralino-nucleon cross section. We discuss dark matter detection in other
direct and indirect detection experiments and caution that the bounds from
these must be interpreted with care. Finally, we show that LHC13 experiments
should be able to probe these non-universal mass scenarios via a variety of
channels including multi-lepton + etmiss events, WZ+etmiss events, Wh+etmiss
events and W^\pm W^\pm +etmiss events from electroweak chargino and neutralino
production.
