Four versions of the Pup were produced by Beagle: the Pup-100 fully aerobatic light aircraft with accommodation for two adults and powered by a 74.5kW Rolls-Royce/Continental O-200-A flat-four engine, deliveries beginning in April 1968; the Pup-150 with seating for two adults but with an optional seat for a third adult or two children and powered by a 112kW Lycoming O-320-A2B engine; the Pup-160 with a 119kW Lycoming O-320-D2C engine; and the Pup-200 with a 149kW Continental engine. A total of 128 Pups had been delivered by the close of 1969, when a further 267 aircraft were on order. However the company went into liquidation and the Pup was developed into the Bulldog by Scottish Aviation.