Abstract: A toy for pets includes a supporting frame, an annular frame, and a running ball. The rods extending respectively from the two opposite ends of the central axis of the running ball are inserted respectively into a pair of opposite holes in the inner periphery of the annular frame to pivotally connect the running ball to the annular frame. The rods extending inward from the two lateral sides of the supporting frame are inserted respectively into a pair of opposite holes in the outer periphery of the annular frame to pivotally connect the annular frame to the supporting frame, wherein the two pairs of holes are angularly offset from each other. A pet running in the running ball can generate a driving force that changes the direction of the running ball and of the annular frame and thereby changes the running direction of the pet itself.

Abstract: A hang-on natural water drinking system adapted to effectuate a natural water state includes: a holder having a pipe segment; a water-holding unit for holding drinking water and provided with a connecting segment for drawing water off the water-holding unit, allowing the pipe segment to fit around the connecting segment; and a drinking unit serving pets and comprising a basic drinking portion, a supporting portion, and a diverting portion, the basic drinking portion having an end extending to form a guide trough for abutting against the connecting segment to guide water to the basic drinking portion. Water is driven by a submerged motor coupled to the basic drinking portion to the diverting portion coupled to the basic drinking portion to circulate through the drinking unit continuously and flow across blocking regions defined at the diverting portion to therefore enter a turbulent white-water drinking state.

Abstract: A drinking-water level alarm lamp for being placed in a water feeder includes a watertight casing including therein a lamp, a rolling ball tilt switch, a battery and a weight. When the water feeder contains drinking water, the drinking-water level alarm lamp half floats above the water by virtue of the inner space of the watertight casing and the weight. When the water feeder contains no drinking water, the drinking-water level alarm lamp lies at a bottom of the water feeder. The drinking-water level alarm lamp uses the presence and absence of the drinking water in and from the water feeder to change a position of the drinking-water level alarm lamp, so that the rolling ball tilt switch in the drinking-water level alarm lamp is accordingly switched to turn on or off the lamp.

Abstract: A pet exercise wheel assembly having a light-emitting device includes an exercise wheel made of a material pervious to light. The exercise wheel has a tapered sleeve projecting from a center of the exercise wheel and is axially formed with a penetrating channel. A light-emitting device has a casing coupled to the tapered sleeve of the exercise wheel. The light-emitting device has a circuit board formed with a central hole and provided with at least a lamp, a battery, a rocker switch, and an IC chip that are electrically connected with each other, with the lamp exposed at an exterior of the casing. Thereby, rotation of the exercise wheel drives the light-emitting device to rotate, so that the rocker switch in the light-emitting device is rocked to close a loop of the circuit board, thus causing the lamp to blink and provide a visual entertaining effect.

Abstract: An angle-adjustable device between two tubes used as a play place for pets comprises a first connecting unit connected to a first tube, a linking body connected to the first connecting unit, and a second connecting unit connected to a second tube and the linking body. By such arrangements, a pipe is formed as a play place for the pets, and the shape of the pipe is adjustable.

Abstract: A connecting device between two tubes for defining a play place for pets, comprises: a female retainer, a male retainer and a quick connect and release locking clamp. The female retainer includes a concave portion and two protruding shafts. The male retainer is pivotally connected with the female retainer and includes a clamping portion. The quick connect and release locking clamp is pivotally connected with the male retainer and includes two grooves. The clamping portion engages in the concave portion, and the two grooves are engaged with the two protruding shafts, so that the two tubes are connected to define a play place for pets.